Audio cassette



FIG. 1 is a top plan view of an audio cassette showing our new design;

FIG. 2 is a front elevational view thereof, the opposite side being amirror image;

FIG. 3 is a right side elevational view thereof, the opposite side beinga mirror image; and,

FIG. 4 is a bottom plan view thereof.

The ornamental design for an audio cassette, as shown and described.